Disc brake device

Abstract

A disk brake device comprises a brake lever 3A toward which a tilting force is applied in opening operation. This brake lever 3A is formed at its lower end with an outwardly protruding stopper 58 into which an adjusting bolt 56 is screwed vertically. A base seat 59 is provided on a base plate 1 immediately under the stopper. A pinion 61 is fitted over an upper end of the adjusting bolt 56 via a one-way clutch 60 so as to rotate the adjusting bolt 56 only in a direction of fasting the same downward. A rack 67, which is supported by the base plate 1, is meshed with the pinion to have a predetermined backlash and to extend in a direction of swing of the brake levers 3A, 3B. This disk brake device allows to assuredly maintain the brake levers 3A, 3B at equally opened positions at left and right in a brake releasing condition, even if brake linings 9A, 9B are worn out and adjustment is made by an automatic lining wear adjusting unit 53 to automatically decrease the gap caused by wear of the brake linings 9A, 9B.

I claim: 
     
       1. A disk brake device comprising: a base plate;   a vertically rotated brake disk;   a pair of brake levers positioned on opposite sides of said vertically rotated brake disk in an axial direction and arranged with ability to open and close at their upper ends and to clamp and brake said vertically rotated brake disk from the opposite sides;   a pair of brake linings positioned between said brake levers and said vertically rotated brake disk;   a lever mechanism pivotally supported on an upper end of one of the brake levers;   a connecting unit for connecting said lever mechanism with an upper end of the other brake lever;   means for pushing up the lever mechanism, so as to open the brake levers at their upper ends;   means for pushing down the lever mechanism, so as to close the brake levers at their upper ends;   an automatic wear compensating unit for shortening effective length of the connecting unit based on relative displacement of the lever mechanism and the connecting unit corresponding to wear of the brake linings;   an outwardly protruding stopper mounted on the lower part of one of the brake levers, said protruding stopper having an adjusting means vertically installed therein;   a rotating means for providing movement of the adjusting means downward and preventing its movement upward; and   a rack supported by the base plate and extending in a direction of swing of the brake levers, said rack being meshed with said rotating means to have a predetermined backlash.   
     
     
       2. The disk brake device according to claim 1, wherein said brake levers are pivotally mounted at their lower ends and may be pivoted toward said base plate. 
     
     
       3. The disk brake device according to claim 2, further including a base seat on said base plate just below said stopper for receiving a lower end of the adjusting means. 
     
     
       4. The disk brake device according to claim 3, wherein the adjusting means is an adjusting bolt. 
     
     
       5. The disk brake device according to claim 4, wherein the means for pushing down the lever mechanism is a spring. 
     
     
       6. The disk brake device according to claim 5, wherein the stopper is tilted down by force of the spring upon opening operation of the brake levers. 
     
     
       7. The disk brake device according to claim 6, wherein the rotating means includes a pinion fitted over an upper end of the adjusting bolt via a one-way clutch, so that the adjusting bolt can be rotated only in a direction of screwing the bolt downward. 
     
     
       8. The disk brake device according to claim 1, wherein the lever mechanism includes at least two interconnected moving parts which can be swung in unison in vertical planes in parallel with a vertical plate on which the brake levers are swung. 
     
     
       9. The disk brake device according to claim 8, wherein the lever mechanism comprising two short levers and two bent levers interconnected by a pivot shaft. 
     
     
       10. The disk brake device according to claim 9, wherein the short levers are substantially in the form of inverted L. 
     
     
       11. The disk brake device according to claim 9, wherein the bent levers are substantially in the form of inverted L. 
     
     
       12. A disk brake device comprising: a base plate;   a vertically rotated brake disk;   a pair of brake levers with brake linings, said brake levers pivotaly mounted so as their lower ends can be pivoted to said base plate in order to open and close at their upper ends and to clamp and brake said vertically rotated brake disk from opposite sides with their brake linings;   a lever mechanism pivotally supported on an upper end of one of the brake levers;   a connecting unit for connecting a portion of said lever mechanism with an upper end of the other brake lever;   a thruster for pushing up the portion of the lever mechanism, so as to open the brake levers at their upper ends;   a spring for pushing down the portion of the lever mechanism when the thruster is not activated, so as to close the brake levers at their upper ends;   an automatic wear compensating unit for shortening effective length of the connecting unit based on relative displacement of the lever mechanism and the connecting unit corresponding to wear of the brake linings;   an outwardly protruding stopper on the lower portion of one of the brake levers which is tilted down by force of the spring upon opening operation of the brake levers, said protruding stopper having an adjusting bolt vertically screwed therein;   a pinion fitted over an upper end of the adjusting bolt via a one-way clutch, so that the adjusting bolt can be rotated only in a direction of screwing the bolt downward; and   a rack supported by the base plate and extending in a direction of swing of the brake levers, said rack being meshed with said pinion to have a predetermined backlash.   
     
     
       13. The disk brake device according to claim 12, further including a base seat positioned on said base plate just below said stopper for receiving a lower end of the adjusting bolt. 
     
     
       14. The disk brake device according to claim 13, wherein the lever mechanism includes at least two interconnected moving parts which can be swung in unison in vertical planes in parallel with a vertical plane on which the brake levers are swung. 
     
     
       15. The disk brake device according to claim 14, wherein the lever mechanism comprising two short levers and two bent levers interconnected by a pivot shaft. 
     
     
       16. The disk brake device according to claim 15, wherein the short levers are substantially in the form of inverted L. 
     
     
       17. The disk brake device according to claim 15, wherein the bent levers are substantially in the form of inverted L. 
     
     
       18. The disk brake device according to claim 15, wherein the short levers are positioned on the pivot shaft between the plates of the brake lever. 
     
     
       19. The disk brake device according to claim 15, wherein the bent levers are positioned at the tips of the shaft lever. 
     
     
       20. A disk brake device comprising: a base plate;   a vertically rotated brake disk;   a pair of brake levers with brake linings, said brake levers being pivoted at their lower ends to said base plate, so as to open and close at their upper ends and to clamp and brake said vertically rotated brake disk from the opposite sides with their brake linings;   a lever mechanism pivotally supported on an upper end of one of the brake levers;   a connecting unit for connecting a portion of said lever mechanism with an upper end of the other brake lever;   a thruster for pushing up the portion of the lever mechanism, so as to open the brake levers at their upper ends;   a spring for pushing down the portion of the lever mechanism when the thruster is not activated, so as to close the brake levers at their upper ends;   an automatic wear compensating unit for shortening effective length of the connecting unit based on relative displacement of the lever mechanism and the connecting unit corresponding to wear of the brake linings;   an outwardly protruding stopper on the lower portion of one of the brake levers which is tilted down by force of the spring upon opening operation of the brake levers, said protruding stopper having an adjusting bolt vertically screwed therein;   a base seat on said base plate just below said stopper for receiving a lower end of the adjusting bolt;   a pinion fitted over an upper end of the adjusting bolt via one-way clutch, so that the adjusting bolt can be rotated only in a direction of screwing the bolt downward; and   a rack supported by the base plate and extending in a direction of swing of the brake levers, said rack being meshed with said pinion to have a predetermined backlash.